Side bearing for street-cars.



PATENTED JULY 26, 1904.

J. E. NORWOOD.

SIDE BEARING EUR STREET GARS.

APPLICATION FILED APB.14, 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

PATBNTED JULY 26, 1904.

J. E. NORWOOD. SIDE BEARING POR STREET CARS.

APPLICATION FILED APB. 14, 1902.

2 SHEETS-SHEET 2.

N0 MODEL.

Witwe/.mea V75 MW,

No. 766,113. Patented July 26, 1904.

UNITED STATES PATENT OEEICE.

JOHN E. NORIVOOD, OF BALTIMORE, MARYLAND, ASSIGNOR TO BALTIMORE BALL BEARING CO., OF BALTIMORE, MARYLAND, A CORPORATION OF MARYLAND.

SIDE BEARING FOR STREET-CARS.

SPECIFICATION forming part of Letters Patent No. 766,113, dated July 26, 1904.

Applieatien filed April 14, 1902. Serial No. 102.867. (No model.)

T CLU 10h07 711/017/ @0W/067%: portion of a Brill truck and indicating the lo- Be it known that I, JOHN E. NoRwooD, a cation and arrangement of the present bear- 50 citizen of the United States, residing at Baltiing. Fig. 2 is atop plan viewotl the bearing.

more, in the State of Maryland, have invented Fig. 3 is a section on line 3 3 of Fig. 2. Fig.

5 certain new and useful Improvements in Side 4 is a section on line 4 Ltot' Fig. 2. Fig. 5 is Bearings forStreet-Cars; and Ido hereby dea section on line 5 5 of Fig. 2. Fig. 6 is a clare the following to be a full` clear, and exbottom plan view of the bearing-casing. 55 act description of the invention, such as will Referring now to the drawings, the present enable others skilled in the art to which it apbearing comprises the casing, including a sub- IO pertains to make and use the same. stantially arc-shaped central body portion 10,

This invention relates to side bearings for having the projecting end bosses 11 and 12, cars, and particularly for street-cars, the strucwhich lie in a line at an acute angle to the ra- 60 ture shown being designed for use in connecdius of curvature of the body portion, these tion with what is known as the Brill truck, bosses having sockets 13 and 14 in their under I5 although it will of course be understood that sides which receive the rounded upper ends the principles involved may be employed in a of the supporting-rods 15 and 16 of the truck, bearing Jfor use in connection with any other (shown in Fig. 1,) whereby rocking engage- 65 form or' truck and in connection with cars ment of the .casing with the posts is secured, other than street-cars. and which rods have the usual sustaining- 2O The object of the invention is to provide a springs 17 and 18, said truck having a strucbearing of the roller type wherein a number ture well known in the art and requiring no of the balls will be active while the remaining specific description. 70 balls are inactive, the balls passing succes- IYithin the casing is formed aball-passage, sively into action and successively out of acincluding' an arc-shaped portion 19, formed tion as the truck swings in either direction, the parallel with the inner concaved face 2O of the path of the balls being such that their direccasing. The ball-casingincludes also an outer tions of rotation are changed in passage from arc-shaped portion 21, parallel to the portion 75 action to inaction, and vice versa, so that the 19, but in a lower plane than the portion 19, balls are made to wear evenly and do not bethe portion 21 being covered excepting for an come lopsided. annular opening 22 in the upper wall thereof A further object of the invention is to so midway of its ends, which permits of the inform the casing for the balls as to effect econtroduction of the bearing-balls 23. The up- 8O omy in metal and at the same time to present per wall or roof of the portion 19 of the ballthe required outside wear-face to receive prespassage is slotted longitudinally, as shown at sure of the flanges of the wear-plates on the 211, and in the bottom of the portion 19 is a body bolster to prevent excessive lateral seat 25, in which is disposed the arc-shaped movement of the body with respect to the race-plate 26 of such a height to support the 85 truck. balls 23 with their upper portions protruding Other objects and advantages of the inventhrough the opening' 24 and above the upper 40 tion will be understood from the following desurface of the casing. The side walls 27 and scription and include the provision of a cas- 28 of the portion 19 of the ball-passage are ing, which may be formed integral and which concaved, and the slot 24 is of less width than 90 will permit of introduction and removal of the the diameters of the balls, so that the balls are balls and wear-plate. prevented from removal through the slot.

In the drawings forming a portion of this As shown in Fig. 5 of the drawings and inspecification, andin whichlike numerals of refdicated in Fig. 4, the ends of the portions 19 erence indicate similar parts in the several and 21 of the ball-passage are connected by 95 views, Figure 1 is a side elevation showing a the inclined arc-shaped portions 29, the inclines extending to the ends of the race-plate, so that when a ball moves from the race-plate it immediately passes out of the plane of action, which is the plane to which the balls upon the race-plate are all tangent.

It will be noted that it is ythe outer portion 21 of the ball-passage that is occupied by the balls when they are inactive and the inner portion when they are active, the portions 29 of the passage being curved reverse] y with respect to the active portion 19. By thus reversing the curvature of the ball-passage the balls never enter upon the raceplate with their same portions uppermost as when they leave the race-plate, so that the active faces of the.V-

balls are continually changing, and as a result the balls are worn evenly. Furthermore, by carrying the balls outwardly from their active positions the casing is enlarged outwardly and provides for the formation of the wear-face 30 at the outer side of the casing, and which wear-face cooperates with the flange 31 on the upper wear-plate 32, carried by the body-bolster, .to prevent lateral motion of the body upon the truck.

In practice the bearing-casing is cast integral, and on the under face are the flanges 33, which serve to strengthen the structure, and opening through the bottom walls of the portions 29 and 2l of the ball-passage are the openings 34, which permit foreign matter that may enter the ball-passage to drop therefrom. To prevent loss of balls in shipment, a cover 35 is provided for the opening 22 and has a laterally-extending portion provided with a stem 36, which is passeddownwardly through the perforation 37 in the bearing-casing and has at its free end a circumferential groove 38, which grooved portion lies in the countervsunken lower end of Athe perforation 37. To

hold the stem in place, and `therewith the cover, a seal 39 is cast into the countersink and into the peripheral groove of the stem.

When the bearing-casing is to be set upon a flat bolster, the opening for the passage of the dirt may be formed through the sides of the casing, as will be understood, and ears may be cast upon the casing to receive bolts for holding it to a bolster.

What is claimed is- K l. In a bearing for cars, an integral casing having a continuous passage therein in which are disposed balls, a portion of the passage having a slot through which the balls project, a removable race-plate in the bottom of lthe slotted portion of the passage and onwhich said balls are supported in action, said slot being of a width less than the diameters of the balls, the slotted portion of the ball-passage being in a higher plane than the remaining portion', and the lower portion of the slot having dirt-outlet openings in its bottom and an inlet for the balls in its top.

2. A bearing for cars comprising a casing having a continuous ball-passage therein and balls in the passage, said passage including an arc-shaped portion having aslot through which the balls project for contact with the bearingplate, said passage extending from the slotted portion exteriorly of the curvature thereof. the side of the casing beyond the last-named portion of the passage having an arc-shaped bearing-face for the purpose set forth.

3. In a ball-bearing for cars, an integral casing having a continuous ball-passage in which are disposed balls, a portion of the passage having a slot through which the balls project, the slotted portion of the ball-passage lying in adifferent plane from the remaining portion of the passage, a part of the said remaigning portion of the passage having dirtoutlet openings in its under side, and a flange upon the bottom of the casing depending below the lower ends of the dirt-outlet openings to hold said lower ends of the openings above a support .upon which the casing may be disposed.

4. In a side bearing for cars, the combination with a casing formed with an endless way having portions lying in different planes and connecting inclined portions, the portion of greatest elevation having a race-plate, of balls disposed in the way, said Way at the ends of the race-plate having openings through its bottom for discharge of foreign matter and to intercept such matter in its passage to the race-plate, and means for holding the casing with thelower ends of the dirt-outlet openings elevated.

5. In a bearing for cars a casing formed integral and having a continuous ball-passage therein in which is disposed a continuous series of balls, a portion of the passage having a slot through which the balls project and in which they are confined, said slot being of lesser width than the diameters of the balls to prevent displacement of the balls, the remaining portion of the ball-passage being covered and having an opening in its roof to permit of insertion of the balls, the slotted portion of the ball-passage being curved reversely to the remaining portion of the ball-passage. In testimony whereof I aliix my signature in presence of two Witnesses. v

JOHN E. NORWOOD. Witnesses: BRUCE B. GooirEE, WM. D. ALLEN.

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